These mounting brackets are used to mount fiber-optic adapters to power sensors. : 9816F Additional accessories are available on request, for example oven windows for use on the oven. Typically made from durable materials. What is a Fiber Optic Sensor? A fiber optic sensor is an instrument that measures light from an LED (or other device) for detection purposes. The. All information about the E20827 at a glance. We assist you with your requirements. See the. EMI was established in 1968 to provide innovative, high-quality, end-of-barrel products and conveyor automation systems for injection molding machines, and since 2001, EMI has been helping customers with End of Arm Tooling.